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Thread: Build Log - Bread Dead Redemption (FW) - First Build.

  1. #81
    Ocracoke's Avatar
    Team Kaizen

    Hahahaha, neat, what sort of gear reduction are you expecting to use on it? Looking forwards to seeing it one day.
    Last edited by Ocracoke; 20th May 2021 at 12:51.
    Team Kaizen - Build Diary for all the robots

    AW: Amai, Ikari, Lafiel, Osu, Ramu
    BW: Shu!, The Honey Badger
    FW: Azriel
    MW: Jibril, Kaizen

  2. #82
    Well, that's partly why the lifter has been delayed. Sorting out a suitable gearbox has been a bit of a pain. Originally had a Banebots 132:1 in to a 2:1 gear stage, but after some advice from Adam Hamilton of Team Immersion it seemed that was a bad idea because the latter stages of the BB box wouldn't take the torque.

    I've now got a 64:1 Nema17 gearbox which will go in to a 3:1 spur stage for 192:1 to keep the speed down with loads of extra torque.

  3. #83
    Hi Andy,

    I look forward to seeing your initial improvements at the May Dojo event. Hope the final build of the lifter goes well as it sounds like it is going to be a beast (I would like to get a fight in before you suplex FeatherDozer out of the arena ).
    Sam Gad

    Learn the hard way Robotics

  4. #84
    Looks great Andy. And sounds like it'll be a proper beast.

    More importantly, have you got a toasting fork related pun lined up?

  5. #85
    Robodojo June 2021

    Well, the May event didn't go to plan. Worked non-stop on the robot in the week building up to the event, only for the ESCs to blow up at 11:30pm on the evening before while I was adjusting some settings. Unfortunately had to drop out.

    Fast forward to June! The scheduled Robodojo Sportsman event took place and I was there. Arrived nice and early and set up a pit space between Sam with FeatherDozer and James with Parasite. Felt so good to be back at events again.

    The day started out with bugbears in the new drive, but gradually with the help of several roboteers and a bit of trial and error, the drive got up to expected standards by the end of the day.

    Video for the fights is below:

    Spoilers/Analysis below:


    Finished watching? Ok, good.

    So I knew the new drive wasn't 100% going in to this. The right hand side was cogging on startup, which effectively meant I was on one side of drive. Over the course of the day, Sam suggested that the acceleration ramp may be too high. This advice worked! The cogging gradually improved over the course of the event as I dropped the max acceleration down to an eventual 1.8% per millisecond.

    Fights-wise, BDR understandably started badly. After a mugging at the hands of EWC and Jean-Luc Pick-Hard, then a survival mission against Ogrelord, the drive improved enough to start getting some wins! To try and help the drive with ground clearance, the trademark dustpan was swapped out for a "Buttering Ram" (which was half of the new BDR bucket screwed on to some HDPE). This ram turned out to be super fun! It felt like driving a bumper car and was much more effective than I expected, although I don't expect it to become a permanent fixture.

    Fight 4 was a proper catastrophe. After a very strong start against PBOCD, a slam in to the wall dislodged the receiver. This then found it's way in to the drive belt, wound itself around the front drive shaft and pulled all of the wires out of both ESCs and the BEC. One ESC was totally ruined, but the other ESC, BEC and Rx were able to be salvaged thanks to some kind donations of Bind Plugs and Servos by Dave Weston to scrounge the connectors from (Thanks Dave!). Bread Dead only made it to working condition 3 minutes before it was due back in the arena for it's 5th fight. Talk about a close call!

    I wasn't expecting much from the day, with so many things being changed. Therefore I was pleasantly surprised when I got the call to an 8-9th place playoff fight against Pressure Point! Pressure Point and Alan have been my benchmark and a robot/roboteer I've looked up to since I started at Dojo, using our fights as an indicator of how I've progressed as a builder and driver.
    It was a great fight to end the day with and I was buzzing to finally get the win after so many attempts!


    So yeah, 3-3 overall for the day and a point to the yearly Sportsman Championship! Plenty of things learned, with changes to the drive being made for the new version. Not sure I'll have the new one ready for August due to planning for BotFest/Robodojo Beetles on the 24th and 25th (Busy weekend!). At least with the FRA Championships not happening this year that takes the pressure off a bit.

  6. #86
    BDR is one scary chonk now Andy. You could really see the effect of swapping out the dustpans and tuning up the motors by the end - I miss the pans but the Buttering Ram is a great pun and seems surprisingly effective.

    I confess I was relieved that you had some traction issues in that first fight as well as us, we'd never have scraped the decision otherwise!

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